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Measuring Setup and Commissioning
optoNCDT 22xx
Comparison and Impact of Averaging
6.3.5
The effect of internal averaging in the controller is to provide an improvement in the output signal for:
Measurement objects with much less backscattering than the reference material
-
Measurement objects with structured surfaces, that is sheet metal or scratched surfaces
-
Although this does not offer any influence on linearity, it does improve the resolution and stability of the
measurements on the aforementioned surfaces. The following diagrams illustrate the impact of the different
internal averaging methods:
Example 1
: Toothed belt disc, rotating measurement object, fixed sensor
N = 1
Recursive
Measured value
N = 1
Moving
Measured value
N = 128
Moving
Measured value
N = 128
Recursive
Measured value
Recursive averaging
Impact:
Smoothing of surface noise, deformation of
the tooth structure
Applications:
Measurements on non-profiled belt-
type materials
Moving averaging
Impact:
Smoothing of surface noise, maintaining of
the tooth structure
Applications:
Measurements on metal profiles
